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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/5279
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dc.contributor.authorBorges, Aline Rocha-
dc.contributor.authorBecker, Emilene M.-
dc.contributor.authorLequeux, Céline-
dc.contributor.authorVale, Maria Goreti R.-
dc.contributor.authorFerreira, Sergio Luis Costa-
dc.contributor.authorWelz, Bernhard-
dc.creatorBorges, Aline Rocha-
dc.creatorBecker, Emilene M.-
dc.creatorLequeux, Céline-
dc.creatorVale, Maria Goreti R.-
dc.creatorFerreira, Sergio Luis Costa-
dc.creatorWelz, Bernhard-
dc.date.accessioned2012-01-30T16:14:58Z-
dc.date.issued2011-04-
dc.identifier.issn0584-8547-
dc.identifier.urihttp://www.repositorio.ufba.br/ri/handle/ri/5279-
dc.descriptionAcesso restrito. Texto completo disponível no PORTAL de PERIÓDICOS da CAPES. p. 529-535.pt_BR
dc.description.abstractThe determination of cadmium (Cd) in fertilizers is of major interest, as this element can cause growth problems in plants, and also affect animals and humans. High-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) with charge-coupled device (CCD) array detection overcomes several of the limitations encounteredwith conventional line source AAS, especially the problem of accurate background measurement and correction. In this work an analytical method has been developed to determine Cd in fertilizer samples by HR-CS GF AAS using slurry sampling. Both a mixture of 10 μg Pd+6 μg Mg in solution and 400 μg of iridium as permanent modifier have been investigated and aqueous standards were used for calibration. Pyrolysis and atomization temperatures were 600 °C and 1600 °C for the Pd-Mg modifier, and 500 °C and 1600 °C for Ir, respectively. The results obtained for Cd in the certified referencematerial NIST SRM695 (Trace Elements in Multi-Nutrient Fertilizer) of 16.7±1.3 μg g−1 and 16.4±0.75 μg g−1 for the Pd–Mg and Ir modifier, respectively, were statistically not different from the certified value of 16.9±0.2 μg g−1 on a 95% confidence level; however, the results obtained with the Ir modifier were significantly lower than those for the Pd–Mg modifier for most of the samples. The characteristic mass was 1.0 pg for the Pd–Mg modifier and 1.1 pg Cd for the Ir modifier, and the correlation coefficients (R2) of the calibration wereN0.99. The instrumental limits of detection were 7.5 and 7.9 ng g−1, and the limits of quantification were 25 and 27 ng g−1 for Pd–Mg and Ir, respectively, based on a sample mass of 5 mg. The cadmium concentration in the investigated samples was between 0.07 and 5.5 μg g−1 Cd, and hence below the maximum value of 20 μg g−1 Cd permitted by Brazilian legislation.pt_BR
dc.language.isopt_BRpt_BR
dc.sourcehttp://dx.doi.org/10.1016/j.sab.2011.04.004pt_BR
dc.subjectHigh-resolution continuum source graphitept_BR
dc.subjectfurnace atomic absorption spectrometrypt_BR
dc.subjectCadmium determinationpt_BR
dc.subjectSlurry samplingpt_BR
dc.subjectFertilizer analysispt_BR
dc.subjectModifierspt_BR
dc.titleMethod development for the determination of cadmium in fertilizer samples using high-resolution continuum source graphite furnace atomic absorption spectrometry and slurry samplingpt_BR
dc.title.alternativeElsevierpt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 66, n. 7pt_BR
dc.embargo.liftdate10000-01-01-
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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